| 기계적 혼합과 고상법에 의해 합성한 LiNi1-yMyO2(M=Zn2+, Al3+, and Ti4+)의 전기화학적 특성 |
| 김훈욱, 윤순도1, 이재천1, 박혜령1, 송명엽 |
전북대학교 신소재공학부
1전남대학교 응용화학공학부 |
| Electrochemical Properties of LiNi1-yMyO2(M=Zn2+, Al3+, and Ti4+) Synthesized by Milling and Solid-State Reaction Method |
| Hunuk Kim, SunDo Youn1, Jaecheon Lee1, HyeRyoung Park1, Myoungyoup Song |
Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University
1Division of Applied Chemical Engineering, Chonnam National University |
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| ABSTRACT |
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By calcining at $750^{circ}C$ for 30 h in $O_2$ stream after milling, $LiNi_{1-y}M_yO_2(M=Zn^{2+},;Al^{3+}$, and $Ti^{4+}$, y = 0.005, 0.01, 0.025, 0.05, and 0.1) were synthesized and their electrochemical properties were investigated. All the samples had R3m structure. $LiNi_{1-y}Zn_yO_2$ (y = 0.025, 0.05, and 0.1) contained ZnO anuor $Li_2ZnO_2$ as impurities. Among the samples substituted with the same element, the samples with relatively large value of $I_{003}/I_{104}$ and the smallest R-factor had the largest first discharge capacity and good cycling performance. $LiNi_{0.975}A1_{0.025}O_2$ had the largest first discharge capacity (172.5 mAh/g) and good cycling performance (about $89.4%$ of the first discharge capacity at the 20th cycle). This sample had the largest value of $I_{003}/I_{104}$ and the smallest R-factor among all the samples. In addition, the particles of this sample were finer and their size was more homogeneous than the other samples. $LiNi_{0.95}A1_{0.05}O_2$ had relatively large first discharge capacity 150.4 mAh/g and good cycling performance. |
| Key words:
Milling, Solid-state reaction method, Electrochemical properties, R-factor |
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